220318228 has 12 divisors (see below), whose sum is σ = 415215220. Its totient is φ = 101685312.

The previous prime is 220318201. The next prime is 220318229. The reversal of 220318228 is 822813022.

It can be written as a sum of positive squares in 2 ways, for example, as 20322064 + 199996164 = 4508^2 + 14142^2 .

It is a junction number, because it is equal to n+sod(n) for n = 220318196 and 220318205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220318229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2118393 + ... + 2118496.

Almost surely, 2^220318228 is an apocalyptic number.

It is an amenable number.

220318228 is a deficient number, since it is larger than the sum of its proper divisors (194896992).

220318228 is a wasteful number, since it uses less digits than its factorization.

220318228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4236906 (or 4236904 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 220318228 is about 14843.1205613914. The cubic root of 220318228 is about 603.9720065093.

The spelling of 220318228 in words is "two hundred twenty million, three hundred eighteen thousand, two hundred twenty-eight".